What's the best program you have ever made?

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What's the best program you have ever made?

What's the best program that you have made, be it in any language, what's the one that you are most proud of?

Mine - since i'm fairly new to c, i haven't made anything i'm proud of without the aid of a book or a post, i'll use a vb example. I made a visual basic program (using API) to change the from name when using 'net send'.

My thesis... which involves actually about 10 VB/eVB apps... one for data collection at electric substations, and the other as a member information tool that uses Sql Server CE to display and search through a member DB.

the company had purchased the rights to use a bunch of source code from somewhere. MP3 to Wav conversion mostly. Then we played through DirectSound if it was available and if not we used Windows sound APIs.

edit: the MP3 to wav was in small chunks, not the entire file in case you were wondering.

Anyway, the program I like best is one I never finished. It's a IRC log parsing program that reads in the chat log and pops out an HTML webpage full of stats from that log such as most active times (bar graph per 15 minutes), who used smileys the most, talked the most, etc...
It was my 2nd ever windows app, so there was a lot of learning, also first ever C program outside of class, so even more learning there using functions I had never used before.